Ignition system.



T. M. MUELLER.

IGNITION SYSTEM. APPLICATION rum) nov.1a. 1008.

' Patented Apr. 4, 1911.

INVEN TOR. WM /z//W BY I A T TOR/V15 Y.

Toall whom 'it may concern:

UNITED sTA ps rATE T oFFioE.

THEODOR M. MUELLER, or DALTON, MAssAcHUsETTs, Assionon To PITTSFIELD SPARKIGOIL COMPANY, or DALTON, MASSACHUSETTS, A CORPORATION.

IGNITION SYSTEM.

Specification of Letters Patent.

Be it known that I, THEODOR H. MUELLER,

'a subjectof theEmperor of Germany, residm at Dalton, in the county of Berkshire and. tateof- Massachusetts, have invented new and useful Improvements in Ignition Systems, of which the following is a specification.

My invention relates to improvements in ignition systems for internal combustion eugines, the object of the invention being to combine with a ma neto electric machine of the high potentia type a stationary induction coil the primary winding of the coil being included in circuit with a make and break device of any suitable construction;

. the secondary winding of the coil furnishing I the spark current as usual.

The generator shown in outline herein is claimed in Letters Patent of the United States issued to me on December 21, 1909 numbered 943,697, on an application filed February 25, 1907 for Magneto electric machines and is merely illustrative of the ,formof generator employed by me.

i The magnetic circuit of the coil is furn'ished by the magneto.

A further object of the invention consists in connecting, in parallel arrangement with the coil of the primary winding, a battery, and a second make and break device being included in the connections of the pr1mary winding of the coil whereby when the magneto is not being operated from the motor the vaporous charge in the engine cylinders may be ignitedifrom'the second make and ;'break or push button device, and the engine started. The usual condenser is arranged across the terminals of the make and break devices. v

Referring to the drawings forming part of this application,the figure in this case clearly illustrates my invention.

In the drawings, the magneto, as a whole,

' is desi ated by the letter a and is provided with t e usual compound field magnets 12, the driving end of the armature shaft being designated at 0.

d designates extension members or portions of the pole pieces that are connected at their outer ends by a core member 0 which serves as a core for the induction coil e, the primary windings of which are designated at f and the secondary windings at g.

h designates a wire leading from one terminal of the secondary windm s to a sparkplug shown at 2' for carryin t e spark current, the other terminal 0% the secondary being connected by means of a wire y to the ground, indicated at In, which, in practice, would be the, framework of' the machine. The primary wire has one terminal connected at m, to the wire j (which is the ground connection) and the other terminal (by means of the wire 11,) leads to the point- 0 of the make and break device 22 of any approved pattern.

The movable part of the make and break device is designated by g and is connected to the primary windings by means of the wire 1'.

A condenser s is connected by means of the wire t to the wire n at the point it which is one side of the make and break device 7), and the other terminal of the condenser is connected by means of a wire 1), to the elastic strip 10. The condenser s is emplo ed as usual to absorb the spark at the terminals 0 and q and also to increase the inductive effect in the secondary winding 9 of the induction coil 6.

It should be understood that durin the operation of the magneto the core 0? the induction coil 6 is energized by means of the extension members'of the pole-pieces, thus generating an electromotive force in the primary windin and, at break of the circuit, by means 0 the make and break device 77, a current is produced in the secondary windin g which appears at the plug 2' in the form 0 a spark.

Referring now to the manner of producing a spark at theplugz' when the magneto is not running: I employ a switch mechanism 7 that is pivoted at the point 8. A wire 9 extends from the point 8 to the wire w.

10 designates a thin flexible tongue having an opening 11 in its free or outer end,

Patented Apr. 4, 1911.

the free end being. located between the contacts'4 and In the position of the parts shown, the tongue l is supposed to rest in contact with the switch 7 at 7 Extending from the fixed contact member .5is a wire 12 which is connected tothe wire-n at the point 13. v

5 isa fixed contact point for the switch member 7 to engage when it. is desired to cut out the magneto a. I

' The operation of the construction'is as follows: lVhen the magneto is furnishing the spark current, as shown in the figure, the condensers (which is connected .across the terminals 0 andg' of. the make and break de vice. 19,) serves to extinguish the spark at these terminals and to quickly demagnetize the core '6 of the coil 6 The wire it leads from one terminal of the condenser s and is connected to thepart 0, the wire 4) from the other terminal of the condensers conveying the current to the tongue member which is in contact with the switch member 7 at 7 and from-this point to the wire 9 that is connected to the return wire '10 to the'other side of the make and break member g, as clearly shown.

When it is desired to'ignite the vaporous charge and start themotor, from the seat of an automobile for example, by means of the movable push button or contact member 4, the operator then forces the tongue '10 away from the switch member 7 thus breaking the contact between the switch 7 and tongue 10 at 7 The reduced portion 4 of the movable member 4 passes through theopeningv 11 in the tongue 10 and engages the fixed contact member 5,,and at thesame time the surface around the opening 11 is engaged'by the shouldered portion 4 of the movable contact member 4 and moves the tongue 10.away from the swi'tchmemher 7 and breaks the circuit leading to the wire o, as mentioned above. The current then flows from the battery g by the wire 3 to the contact 4; and from this contact-to the contact 5, wire 12, wire a, primary winding f, and wire 'w back to the other pole of the battery 3 When the contacts 4 and 5 are opened, a spark will appear at the plug 2' thus starting the motor and operating the make and break devices p. The operator the wire 25 being connected to the other ter I 'minal of the condenser s by means of the wires t, n, and 12. If it is desired to cut 1 current will be the rotation of the cam 7 of the make and break device p will close the circuit through the primary winding f of, the coil 6 and produce the spark current in the secondary winding which will flow'to the plug 2' by means of the wire it.

When the engine is not running, and the terminals g and, o are open, if the operator wishes to start 'the engine he simply closes the terminals 4 and 5 to permit the current to flow from the battery yoto' theprimary winding-by means of the wires 12,7 and 10. When the terminals 4 and 5 are separated, the induced current in the secondary winding will cause the spark to be produced at the plug 2', the condenser at the same time discharging, in order to increase the inductive eflect of the secondarywinding 4 and 5.

It will therefore beseen that I'have pro: duced a very simple and inexpensive means forigniting the'vaporous, charge of an in-' and extinguishing the spark at the'terminals coil isenergized by the generator which is shown in outline only in the present case.

The particular construction of the generatoris not an essential part of the present case as ,the same is fully described and claimed in my above referred topatent; In-

general it may be statedthat the generator.

employed is of the inductor alternator type in which the field flux is made to surge back. and forth through the core of the induction;

coil. 7

What .I claim, is

1. An electrical 'gnition system c0mpris-- ing amagneto electrical machine, an induction coil included in the magnetic-circuit'of *the field, a'make and breakforthe primary,

. a condenser connected across the terminalsof themake and break device, a battery,

electrical connections from the batteryto the primary windings, a make and break devlceinsaid last mentioned connect1ons3,

and means including theconnections'v, 10,-

7, 9, w, 9, o and twhereby when the last mentioned make'andbreak device is op-- erated the condenser will be connected around the terminals of-said. second men.-

tione d make and break device, and whereby as described.

produc'ed in the secondary,

the magnetic circuit of the machine, a batindependently of each other, a current will tery, make anddbll'eak devilces, a clondenser be produced in the secondary.

common to sai cevices, e ectrica connec- 1 tions extending from the battery, make and THEODOR MUELLER ,5 break devices, and the condenser to the Witnesses:

primary windln of said coil, whereby when K. I. CLEMONS,

the make and reak devices are operated H. W. BOWEN. 

